Directory traversal in nBill

1) Directory traversal

EUVDB-ID: #VU3474

Risk: High

CVSSv3.1: 8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N/E:F/RL:O/RC:C]

CVE-ID: CVE-2010-4270

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote attacker to view contents of arbitrary files on the server.

The vulnerability exists due to insufficient filtration of user-supplied input in "/administrator/components/com_nbill/admin.nbill.php" and "/components/com_nbill/nbill.php" scripts. A remote attacker can send specially crafted HTTP request, containing directory traversal sequences (e.g. “../”) and view contents of arbitrary file on vulnerable server.

Successful exploitation of the vulnerability may allow an attacker to gain unauthorized access to potentially sensitive information.

Note: this vulnerability is being actively exploited against Joomla! installations.

Mitigation

Install patched version from vendor's website.

Vulnerable software versions

nBill: 1.2_10 for Joomla! - 2.0.10

External links

http://www.nbill.co.uk/forum/index.php/topic,2158.0.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.